Detective Conan
What I love about it: The fact that I have watched over 400 episodes of this show and am still not able to guess the murderer is absolutely the best thing about this show.
Read more about Detective ConanThe Leader?
My suspicions about who the leader of the organization I know is definitely far from being true, the usual suspects is someone close to Conan but the craziest one I've heard if Professor Agasa but this could still be plausable.
Why not tell Ran?
I have to admit that I have my reserves about leaving Ran out of all that is going on, due to the fact that she herself is still being put in danger, however I understand that if Kudo does reveal the truth to her she will put herself in more danger to protect him. But I guess that just shows how much they both love each other.